: Symbian games typically came packaged as .sis or .sisx installer files, or as universal .jar (Java ME) files depending on the version. Dedicated mobile preservation forums archive these specific 320x240 resolution variants. The Legacy of Pre-App Store Mobile Gaming
In DragonBird, destroying enemies earns you in-game currency. There are no free power-ups lying around. To get better weapons, shields, or new ships, you have to save up your credits. The game features , each with unique abilities, and eight large levels (stages) to battle through. As a Russian review of the time noted, "the more enemies you destroy, the more money you will have to upgrade your aircraft".